docs: def bigquery(line, cell=None):
    """Implements the bigquery cell magic for ipython notebooks.
  
    The supported syntax is:
  
      %%bigquery <command> [<args>]
      <cell>
  
    or:
  
      %bigquery <command> [<args>]
  
    Use %bigquery --help for a list of commands, or %bigquery <command> --help for help
    on a specific command.
    """
    namespace = {}
    if line.find('$') >= 0:
      # We likely have variables to expand; get the appropriate context.
      namespace = datalab.utils.commands.notebook_environment()
  
    return datalab.utils.commands.handle_magic_line(line, cell, _bigquery_parser, namespace=namespace)